Database
[{"_id":ObjectId("633c6ee4317752423543e8c8"),"ID1":-1,"Engagements":[{"ID2":"-2","Session":[{"GUID":"123","Created_Date":"01-01-2022"},{"GUID":"012","Created_Date":"01-01-2021"}]},{"ID2":"-3","Session":[{"GUID":"234","Created_Date":"01-02-2022"},{"GUID":"456","Created_Date":"01-03-2022"}]}]}]
Query
db.collection.update({"_id":ObjectId("633c6ee4317752423543e8c8")},{"$set":{"Engagements.$[engElem].Session.$[sessElem].New_Info":"999"}},{"arrayFilters":[{"engElem.ID2":"-2"},{"sessElem.GUID":"123"}]})